http://book.klll.cc/ebooks/subject/26945.opds?sort_order=downloads 2025-08-07T06:45:08Z Books about Helgoland (Germany) -- Juvenile fiction (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-07T06:45:08Z https://book.klll.cc/ebooks/subject/26945.opds?sort_order=title Sort Alphabetically by Title 2025-08-07T06:45:08Z https://book.klll.cc/ebooks/subject/26945.opds?sort_order=release_date Sort by Release Date 2025-08-07T06:45:08Z https://book.klll.cc/ebooks/50050.opds The Sea-girt Fortress: A Story of Heligoland Percy F. Westerman 2025-08-07T06:45:08Z https://book.klll.cc/ebooks/26689.opds Tyttö Helgolannista (Finnish) Gustav Nieritz